The functions in this menu allow the user to create and modify surfaces in eta/DYNAFORM. The dialog box is illustrated in Figure 5.2.1.
Figure 5.2.1 Surface dialog box
eta/DYNAFORM uses two sets of dotted lines to show the contour of a surface. These lines are called U-V lines.
• U-V LINE
This function controls the on/off display of the U-V line on the surface.
• SURFACE NORMAL
This function controls the on/off display of the normal direction of the surface while the U-V line function is on.
NOTE: In FILL COLOR and SHADE mode, the program provides a depth filter function when using PICK SURFACE option to select surfaces, as illustrated in Figure 5.2.2. If there are multiple overlapping surfaces in the current view direction, the program will select the first surface by default. The other three options do not have this function.
Figure 5.2.2 Select Surface dialog box
A detailed description of these options is given in the following sections.